An uncaught Exception was encountered

Type: Error

Message: Call to undefined function mysqli_init()

Filename: /var/www/freelance/_waitlist/system/database/drivers/mysqli/mysqli_driver.php

Line Number: 135

Backtrace:

File: /var/www/freelance/_waitlist/application/core/Loader.php
Line: 353
Function: DB

File: /var/www/freelance/_waitlist/application/core/NS_Controller.php
Line: 7
Function: database

File: /var/www/freelance/_waitlist/application/controllers/Index.php
Line: 5
Function: __construct

File: /var/www/freelance/_waitlist/index.php
Line: 316
Function: require_once